In the paper we consider the structure of information dialogues. Our study is based on Estonian
dialogue corpus which contains two kinds of dialogues – transcriptions of spoken conversations, and
dialogues collected with the Wizard of Oz method. We are using two ways for describing the structure of
dialogues – a typology of dialogue acts, and a system of communicative strategies. We depart from the notion
of communicative strategy introduced by Kristiina Jokinen in her Constructive Dialogue Model. The analysis of
our empirical material shows that people are using similar communicative strategies in telephone
conversations and computer interactions. In the same time, the structure of human-human conversation is
much more complicated.